Combined electric indicator and steam-flow meter.



v J. WILKINSON. COMBINED ELECTRIC INDICATOR AND STEAM PLOW METER.APPLIOATION FILED JUNE 21, 1912.

L76A73o Patented 0011. 21, 1913.

Imventew: James Will 5 r'wsorw JAMES WILKINSON.

Q BOS, ,Q massao rusarrs, AS GNOB To GENERAL ELECTRI COMPANY, ACORPORATION on NEW YORK.

To all whom it may concern; v

Be it known that I, JAMES. WILKINSON, a

citizen of the United States, residing at Boston, in the county ofSuffolk, State of Massachusetts, have invented certain new and usefulImprovements in Combined Electric Indicators and Steam-Flow Meters, ofwhich the following is a specificatifim- This invention relates todevices for enabling the firemen tending the several units in a batteryof steam boilers to obtain from each boiler its pro ortionate share ofthe total output of the attery.

To this end the invention consists in a. system of electric indicatorscombined with steam flow meters, as hereinafter setforth andparticularly pointed out. in the cla ims.

The accompanying drawing is a diagram showing one embodiment oftheinvention, Three boilers 1- are represented in the drawing, but thenumber is immaterial. They are connected by risers 2 to a header 3 fromwhich the steam is led by one or more.

mains 4.- to one or more engines, such as the turbines 5, driving theelectric generators 6.

, In the drawing three generators are shown, feeding in parallel intothe bu'sbars 7. When more than one generatoris used, they are preferablyconnected by an equalizer conductor 8.

In one of the busbars is a series resistance 9, and in shunt thereto isan'amn'icter l0.

- A shunt circuit 1.1 is thrown around this ammeter, controlled by anadjustable rheostat 12. In this circuit is a master amineter 13, whichis in series with a plurality of auxiliary amnieters 14, each adjacentto its respective boiler 1. 'In the riser 2 of each boiler 'is insertedthe pressure-difference nozzle of a flow meter 15, which is arrangedadjacent to the auxiliary ammcter l4; preferably in such a way that thetarget ill of said meter swings over a scale concentric with that of thean'iineter needle 17.

The main aminetei' 10 of courseimlicates the total current] ilbwing inthe busbars, Assuming a load of 900 anipercswin the three generators,the needle of the ammctcr 10 will stand at that figure on its scale. Thestation operator will then more the arm of the adjustable rhcosiat 1:2until the needle oi the master ammeter I3 coincides with an indicationof 300 ampercs on its scale. This permits a small'current to How throughthe auxiliary ammeters 14, whose needles w ll Specification of LettersPatent.

jacent to the annncters 10 and 13.

l COMBINED ELEG'IRIC INDIGATOR AND STEAM-FLOW METER.

Patented Qet. 21,3913.

A nc no filed June 21, 1913. Serial rm, 704,999.

all, move to the 300 mar-k on their scales. In th s way each firemanwill be informed as towhat share of the total load his boiler shouldtake care of and will thereupon i aster ammeter 13, and each firemanwill work his fire to cause the target of his flow meter to follow thevariations of the amrneter needle.

The :drawing shows an additional engine 18 driving a generator, 19 andfeeding the busbars 20. A series resistance 21 is in circuit with one ofsaid busbars, shunted by an ammeter 22, which is located preferably ad-With this arrangement, the operator adds the reading of the ammeter 22to that of the amr'neter. l0 and dividesthe total by the number ofboilers in service, to obtain the share of each. The rheostat l2 is thenadjusted accordingly to cause each auxiliary a-mmeter to indicate saidshare of the total output. I I

. In accordance with the provisions of the patent statutes, I havedescribed the principle of operation of my invention; together with theapparatus which I now consider to represent the best embodimeyt thereof;but I desire to have it understo d that the apparatus shown is onlyillustrative and that the invention can be carried out by other means.

boilers, a common header into which they feed, a flow meter for eachboiler, one or more steam driven electric generators and bus barsconnected with said generators, the combination with a series resistancein one of. said bus bars and means for indlcating the total outputofsaid generators, of means in shunt to said resistance for indicatingthe share of such load which each boiler should carry, and means locatedad acent to each boiler. for indicating such share.

2. In asystem comprising aplurality of combination with a seriesi'esistu nce in one of said bus bars and means for indicating; the totaloutputof said generator, of adjustable means in shunt to said resistancefor indicating the share of such load which each boiler should carry,and means adjacent to each flow meter for indicating such share.

3. In a system comprising e plurality of boilers, a common header intowhich they feed, a How meter forcach q'boilei', one more steam drivenelectric generators, and bus bars connected with said generators, thecombination with a series resistance in one of said bus bars, of anammeici' in shunt thereto, a controllable circuit in shunt to saidammeter, and auxiliary ummctei's in series therein and adjacent to therespective flowmeters.

4. In a system comprising an plurality of boilers, a common header intowhich tiey I I f '1 F i 1 feed, a flow meter 15m.- esch boiler providedWish :1 targe, one or more steam (iriven elec- "trio gencmioirs and huebars com eeieol' with said generators, the comhiziation Wiih a seriesresistance in series with one of said bars, of

an ummeler in shunt thereto, a circuit in

